It isn't that he and Katniss don't get along, because they do, marginally. They haven't really spent a whole lot of time together, so Derek hasn't really been able to get much of a read on her and how they'll get on in the long run. He imagines that she's facing the same struggle, but maybe not. Maybe not everyone is as overly analytical about every relationship they start no matter how shallow or deep that relationship ends up being. Maybe it's just him.

Derek starts to think that it really must be, because she's joined him at his post and that smile he sees on her face takes him back in time. Back to the times when Paige was alive; when he was young and in love and had fun. She's smiling like Paige used to before she'd drag him into the band room after school when it was abandoned and no one was there to hear or see them except the musical instruments abandoned there for being too large to carry home from school.

"What...are you doin'?" he asks, sounding half-confused and half-amused as she takes his hand and puts it on her waist. She's a little young so it's not like he's taking this as anything in the vein that the smile really reminds him of, but all the same, it takes him off guard. And then she's dancing. Okay, that separates her even further from Paige because they never danced, they just groped each other in dark corners and abandoned distilleries, but the freedom and carefree attitude she's sporting still keeps that trace in his mind.

In spite of himself, Derek laughs a little, his eyebrows lifted with interest. "So your go-to is dancing? There's no music," he points out.